Door-bell



J. W. ROSS. DOOR BELL.

(No Model.)

Patented Feb; 9, 1892.

f'fi iw UNITED STATES PATENT OFFICE.

JAMES W. ROSS, OF YOUNGSTOWN, OHIO.

DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 468,403, dated February 9, 1892- Applioation filed March 80, 1891. Serial No. 386,886- No model.)

To aZZ whom, it may concern.-

Be it known that I, JAMES IV. ROSS, a citizen of the United States, residing at Youngstown, in the county of Mahoning and State of Ohio, have invented certain new and useful Improvements in Door-Bells; and I do hereby declare the following to be a full, clear, and exact description of my invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to that class of doorbells not employing electricity; and its object is a door alarnrbell so combined with a doorlock having a latch bolt moved by knobs that the turning of a knob in either direction rings the bell unless disconnected, thus dispensing with the pull-knobs, handles, and buttons by which such bells are now operated, and for use not only in calling for admission, but also as an automatic door-alarm of great value in giving notice to the occupants of a building or room of the opening of a door. I accomplish this object by the mechanism hereinafter described, and illustrated in the drawings, in which Figure 1 is an elevation view of the inner surface of a section of a door having my invention as it appears in place. Fig. 2 is a plan view showing the several parts of my doorbell in relative positions uncovered by the bell proper and the escutcheon and disconnected from the door. Fig. 3 is a side elevation of the disconnector and its co-operating parts.

The several parts are indicated by letters,

and similar letters refer to similar parts throughout. 7

In the drawings my invention is shown as combined with a mortise-lock; but it may, with slight variations in the manner of application not requiring invention, be used with any door-lock having a latch-bolt moved by knobs. The drawings also exhibit the bell as placed above the look; but it may with equal readiness be placed at any point on the door desired.

To provide room beneath the inner escutcheon of the lock for the parts connecting the bell-arm a with the knob-shaft, a sink is made surface of the door, shall not in its verticalrnovement strike the edge of the escutcheon e. The lift Z appearing on the under side of the escutcheon e, and which rests in the sink when in place, is in form three sides of a hollow square, the open side being upward and the inner edgeof the lower side being concave to closelyincase the parts connected with the knob-shaft. The tumbler t is a disk with a central angular opening for the passage of the knob-shaft, from which has been cut away in its right and left upper quarters two equal sections on lines extending from each side inward and slightly downward, each for about one-fourth the breadth of the disk, and thence upward with a curve to a point on the periphery above the central opening, presenting the form seen at t in Fig. 2 of the drawings. This tumbler t is placed upon the knobshaft, its notched parts upward, to receive the bifurcated parts of the bell-arn1, one in each notch. The bell-arm a is a strip of fiat metal of suitable size, bifurcated in the form of a common wrench at its lower end, which rests, as already stated,and extends upward, entering the slot in the bell-plate p. Near the escutcheon c it rests in the channel described, bending outward, so as to lie against the door-surface the greater part of its length. At a convenient point on the outer side of the bell-arm a there is placed the lift Z, with an abrupt lower side, below which there is a longitudinal slot, through which passes the screw upon which the disconnector (1 turns. The disconnector (Z is a disk-cam, the upper edge of which is in contact with the lower side of the lift Z, so that when the edge most distant from the pivot is uppermost the bell is disconnected by elevating the lower end of the bell-arm a above contact with the tumbler 6. Near the upper edge of. the bell-arm a there extend outward from its outer surface three short posts aligned nearly longitudinal with the arm, the uppermost to form a rest for one end of the bell-spring s and the other IOC two to move the bell-lever g, which, pivoted on the bell-plate at the right of the bellarm a, passes between them.

The bell-plate p is a flat rectangular piece of metal having the slot already mentioned cut upward from its lower edge, carrying at its center the post that supports the bell, and attached to the door-surface by means of screws. Nearits left lower corner it carries the pivot-pin 2' and the check-post c for the handle of the bell-hammer. The bell-hammer handle h is of wire. Pivoted at its lower end on the pivot-pin i, it curves to the right and upward to the edge of the slot, and thence to the left and still upward, forming an elbow, against which the bell-lever 9 acts above and below, and thence passingupward beyond the bell-post it curves outward, terminating in a hammer, which acts against the inner side of the bell. The bell-spring s is of spring-wire. At one end it clasps over the upper post of the bell-arm a, and thence curving to something like a parallel with the lower edge of the bell and held to the bell-plate p by staples. It passes to and its foot rests against the side of the handle of the bell-hammer near its pivot. The bell is attached to the bell-post by means of a threaded opening in the center of the belldome and corresponding threads upon the upper end of the post.

The several parts of my invention and their operation will now be understood. By turning the door-knob in either direction a notch of the tumbler t, if not disconnected, is elevated, lifting the bell-arm a, which presses the bell-lever g upward, forcing backward the hammer, which by force of the bell-spring s is driven forward to strike the inner side of the bell as soon as the lever has passed the elbow of the handle h, the force of the spring being sufficient to send the lever to its first position by the reverse of its first movement, again causing the hammer to strike the bell.

' The operation of the disconnector,which is of great value when from illness or other cause the ringing of the bell is undesirable, has already been fully explained.

What I claim is In door-bells, the combined door-bell and automatic alarm consisting, in combination with any door-lock having a latch-bolt moved by knobs, of the tumbler t, shafted upon the knob-shaft, with its right and left notched sides upward, the flat metal bell-arm a, having the branches of its bifurcated lower end resting in the notches of the tumbler t and provided with theliftZ upon its outer surface immediately above a longitudinal slot therethrough and extending upward to contact with the bell-hammer handle 7z,the cam-disk pivoted upon a screw passing through the slot in the bell-arm a, forming the disconnector d, the rectangular bell-plate q, havinga slot cut upward from its lower edge, in which rests the bell-arm a, and carrying near its center the bell-post and near its left lower corn er the pivot-pin 'iand the check-post c, the wire bellhammer handle h, pivoted on the pin 1', from thence curving to the right upwardly, and then to the left upwardly beyond the bellpost, and thence outward and downward, terminating in a bell-hammer, the wire bellspring 3, clasped at one end over the upper part of the bell-arm a, and thence curving above the bell-post and held to the bell-plate g by a staple, passing to a contact at the other end, with the bell-hammer handle it below its elbow, and a dome-formed bell held by threads upon the bell-post, the upper end of which passes through its center, substantially as described in the foregoing specification, and for the purpose therein expressed.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

JAMES W. ROSS.

WVitnesses:

A. J. PACKARD, FRANK B. MEDBURY. 

